If you find that you are unable to print very fine lines under Mac OSX which printed perfect under Mac OS 9, this is a known issue with Mac OS X. The problem is a bug in the apple's Mac OS X anti-aliasing code.

The problem is marginally fixed in 10.3 but not completely. With Mac OS 9, the data being passed onto drivers was vector data but with Mac OS X, it is pixel based, as we, developers of drivers, no longer have much control when printing, it is up to apple to completely fix the bug.

This does not only happen with our driver but printing in general. If you do a preview, you will see the problem is also apparent in there.